EX stage
Clear stage 7 in the corresponding difficulty

Match mode
Clear Stage 7

SP difficulty
Beat the boss you want to fight in with a rank of B or higher. Difficulty doesn't matter.

Unlockable weapons by number of Plays or Rank
All weapons can be unlocked by reaching a number of plays, i. e. the number of times you start AND finish in ARCADE, STORY or MATCH mode. It doesn't matter whether you win or lose and get a rank E, closing the game or returning to the main menu however doesn't count as a play.

Weapons ordered by slot.

Achieving a certain rank in a stage in either ARCADE or STORY mode can also unlock a weapon.

http://i.imagefra.me/a6dju4bz


Souce : http://suguri.wikia.com/